mknative-gcc for GCC 10.5.0.

regen everything for GCC 10.4.0.

mknative-gcc for GCC 10 and almost all platforms. one of the
myriad of arm platforms, and the powerpc* platforms are not
yet done.

mknative-gcc for gcc 9.3.0 and amd64.

the tree has quite a number of issues to resolve before it builds.

mknative-gcc for all platforms for GCC 8.4.0.

mknative-gcc for GCC 8.3 and all ports.

first cut mknative-gcc for gcc7 amd64. i've hand edited some
libgcc files to ease mknative updates.

not functional yet.

regenerate everything for GCC 6.5.

sh3eb and sh3el had a problem wtih libstdc++ i had to work around for now.

mknative-gcc for alpha, earm, i386, mips64eb, powerpc, sparc,
sparc64, and x86-64. tree does not fully build yet, however.

regen for gcc 5.5.

mknative-gcc for all but sparc64, vax and sun2 and GCC 5.4.

first stab mknative-gcc for GCC 5.3 and amd64.

regen mknative files for GCC 4.8.5.

rerun mknative for GCC 4.8.4 and all platforms.

m68000 needs -fPIC removed (again), and hppa c++config.h turned off
several things present in -lm, fixed by hand.

regen mknative for gcc 4.8-2014-10-09.

rerun mknative-gcc for GCC 4.8.3 release.

XXX: still not 100% right, but we're getting close.

merge GCC 4.8 build.

regen mknative files for GCC 4.5.4.

run mknative-gcc for amd64 and GCC 4.5.

this is only enough to build crtstuff, libgcc* and libobjc.